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life in Biological Definition

Abiogenesis

... general sense, is the hypothetical generation of life from non-living matter. Today, the term is ... in the context of biology and the origin of life . Some confusion exists on this topic, because ... organisms. As knowledge of microscopic forms of life increased, so the apparent possibilities of ...

Alfred Russel Wallace

... showTocToggle("show","hide") 1 Early life 2 Exploration and study of the natural world ... about Wallace 10 See also Early life Wallace was born at Usk , Monmouthshire . He ... least three times in history: 1. The creation of life from inorganic matter. 2. The introduction of ...

Apoptosis

... generally confers advantages during an organism's life cycle. For example, the differentiation of human ... as Horvitz narrated in his Nobel Lecture "Worms, life and Death", delivered on 8 Dec. 2002 [14] . ... ). External links Entrez is a life sciences information search engine provided by ...

Artificial life

... Artificial life , also known as alife or a-life , is the study of life through the use of human-made analogs of living ... of Living Systems" (otherwise known as Artificial life I) at the Los Alamos National Laboratory in ...

Biology

... Biology studies the variety of life (clockwise from top-left) E. coli , tree ... beetle Biology is the science of life (from the Greek words bios = life and logos = reasoned account). It is concerned ...

Biodiversity

... 1 Biodiversity definitions 2 Origin of life and biodiversity evolution 3 Benefits of ... and soil that surround them. Origin of life and biodiversity evolution See also ... species can give scientists some clue as to how life evolved and will continue to evolve on Earth. In ...

Botany

... Botany is the scientific study of plant life . As a branch of biology , it is also sometimes ... 1.1 Feed the world 1.2 Understand fundamental life processes 1.3 Utilise medicine and materials ... Scope and motivation of botany As with other life forms in biology, ...

Cancer

... to distant locations ( metastasize ) and become life threatening. Contents ... unregulated growth potential occur very early in life and progress very quickly. The age of peak ... may detect small cancers that would never become life threatening, but once detected will lead to ...

Charles Darwin

... showTocToggle("show","hide") 1 Early life 2 Journey on the Beagle 3 Return to ... See also 14 External links Early life A seven-year old Charles Darwin in ... joined Grant in pioneering investigations of the life cycle of marine animals on the shores of the ...

Cladistics

... changes in organisms' morphology, ecology, or life history - in short, that both taxa and clades are ... also Scientific classification tree of life Phylogenetic tree Systematics ... into Phylogenetic Systematics Tree of life Web Project extensive bibliography for ...

Common descent

... about 3.5 billion years ago (see: origin of life ). History The first suggestion that all ... from some one primordial form, into which life was first breathed." "The whole history of ... has also provided support for UCD. The Tree of life Web Project ...

DNA

... biological development of all cellular forms of life and many viruses . DNA is sometimes referred to ... or " express " at one or several points in its life using the information of the sequence. The ... Bibliography DNA: The Secret of life , by James D. Watson. ISBN 0-375-41546-7 ...

Entomology

... of interactions with humans and other forms of life on earth, so it is an important specialty within ... , is primarily focused on their ecology and life habits, the primary concern being the ... a fire, using facts such as what stage of the life cycle the insect/bug is in, et cetera. ...

Evolution

... process of change over time. In the context of life science , evolution is a change in the traits of ... Genetic sequence evidence 1.1.3 Origin of life 1.2 The emergence of novel traits ... addition, abiogenesis — the generation of life from non-living matter — has never been ...

Evolutionary tree

... as a "tree" results from earlier ideas of life as a progression from lower to higher forms. ... class, order, family, genus and species . life Domain Eubacteria Actinobacteria ... The Tree of life — A multi-authored, distributed Internet ...

Extinction

... periods at lower toxicity levels by affecting life span, reproductive capacity, or competitiveness. ... University , in his 2002 book The Future of life ( ISBN 0679768114 ), estimates that if current ... biosphere continue, one-half of all species of life on earth will be extinct in 100 years. See ...

Human

... A human skeleton Birth and death The life of the individual begins at conception . An ... fetuses while they remain in the uterus. Human life ends with the individual's death . Compared ... not fixed. There are striking differences in life expectancy around the world. The developed world ...

Life

... of "life" in biology . For other uses, see life (disambiguation) and Living (disambiguation) . life is a multi-faceted concept with no simple definition. life may refer to: the ongoing process of which ...

Marine biology

... biology is the study of animal and plant life within saltwater ecosystems . Given that in ... marine biology deals with those species in which life is spent only (or mainly) in the water, thus its ... fields 3 Lifeforms 3.1 Microscopic life 3.2 ...

Microorganism

... Microorganisms were probably the first form of life that appeared on Earth. Today they have an ... BBCNews: 16 January, 2002, Tough bugs point to life on Mars Citat: ... research demonstrates ... ... BBCNews: 17 January, 2002, Alien life could be like Antarctic bugs ...

Nutrition

... cutting down on food reduced their quality of life so considerably as to negate any possible ... years which may gradually and inevitably reduce life expectancy. This has set researchers off on a ... instance, Costa Rica and Guadaloupe have higher life expectancy than the United States, U.N figures ...

Origin of life

... of life. For alternate uses, see origin of life (disambiguation) . Research into the origin of life is a limited field of research despite its ... facts give insight into the conditions in which life may have emerged, but the mechanisms by which ...

Paleontology

... is the study of the developing history of life on earth, of ancient plants and animals ... Overview Modern paleontology sets ancient life in its contexts, by studying how long-term ... of long-term patterns in the evolution of life on earth. The same is the case with Croatian ...

Plant

... is completely reduced, and the sporophyte begins life inside an enclosure called a seed , which ... Growth Simple plants like algae may have short life spans as individuals, but their populations are ... Structure External links Tree of life Chaw, S.-M. et al. Molecular Phylogeny of ...

Plant

... is completely reduced, and the sporophyte begins life inside an enclosure called a seed , which ... Growth Simple plants like algae may have short life spans as individuals, but their populations are ... Structure External links Tree of life Chaw, S.-M. et al. Molecular Phylogeny of ...

Rudolf Steiner

... separation between the State and cultural life A government should not be able to control ... separation between the economy and cultural life A corporation should not be able to control ... that process. He often said there was a hidden life in thinking and advised people to attend more to ...

Thermoregulation

... some other animals 6 Limits compatible with life Temperature regulation life on earth exists within a narrow range of ... the Arctic regions. Limits compatible with life There are limits both of heat and cold that a ...

Unsolved problems in biology

... unsolved problems in biology include: life . How did it start? Is life a cosmic phenomenon? Are the conditions necessary for the origin of life narrow or broad? How ...

Virus

... large implications in the study of the origin of life . In the debate of whether viruses are alive or ... viruses are more efficient than most cellular life forms as their ratio of functions to working ... alive then the prospect of creating artificial life is enhanced or at least the standards required ...

Astrobiology

... (in Greek astron = star, bios = life and logos = word/science), also known as ... the possible variety of extraterrestrial life . It also includes the concept of artificial life , since ...

Bioinformatics

... the complex connections of these cellular processes. Artificial life or virtual evolution attempts to understand evolutionary processes via the computer simulation of simple (artificial) life forms. Other applications Morphometrics is used to analyze ...

Bioinformatics

... the complex connections of these cellular processes. Artificial life or virtual evolution attempts to understand evolutionary processes via the computer simulation of simple (artificial) life forms. Other applications Morphometrics is used to analyze ...

Diabetes mellitus

... diabetes in the developing countries follows the trend of urbanisation and life style changes. Diabetes is in the top 10, and perhaps the top 5, of the ... screening is recommended for many types of people at various stages of life or with several different risk factors. The screening test varies ...

Down syndrome

... with disabled children, giving future mothers first hand information on life with a disabled child. It has been widely recognized in democratic ... share many of the characteristics of their parents, with an average life expectancy of 49 years in the USA versus 77 years for the whole population ...

Morphogenesis

... morphogenesis can also be used to describe the development of unicellular life forms that do not have an embryonic stage in their life cycle, or to refer to the evolution of a body structure within a ...

Enzyme

... and because many chemical reactions would occur too slowly to sustain life ; oxidation of organic food compounds to provide energy, for instance. ... is, without both of these classes of enzymes, (digestive and metabolic) life could not exist. Enzyme naming conventions By common convention, ...

Francis Crick

... atheist who also advocated directed panspermia as a hypothesis for how life started on Earth. Crick was also one of the original endorsers of the ... book also formed the basis of the award winning television dramatisation life Story by BBC Horizon (also broadcast as Race for the Double Helix ). ...

Fungus

... They develop into new mycelia, which invade some substrate and repeat the life cycle. These may become very large, often several square metres in size; ... Wallingford, United Kingdom. 616p. External links Tree of life Web Project: Fungi The Mycology Net MykoWeb: Mushrooms, Fungi, ...

Gene

... population genetics . Because each discipline models the biology of life differently, the usage of the word gene varies between disciplines. It ... sequence to a specific amino acid is essentially the same for all known life , from bacteria to humans . Through the proteins they encode, genes ...

Genetics

... in the DNA sequence is called epigenetics . Some take the view that life can be defined, in molecular terms, as the set of strategies which RNA ... perpetuate themselves. This definition grows out of work on the origin of life , specifically the RNA world hypothesis . Population, quantitative ...
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